एपीए उद्धरण

Freeman, H. J. (2009). Long-term natural history of Crohn’s disease. The WJG Press and Baishideng.

शिकागो स्टाइल उद्धरण

Freeman, Hugh James. Long-term Natural History of Crohn’s Disease. The WJG Press and Baishideng, 2009.

एमएलए उद्धरण

Freeman, Hugh James. Long-term Natural History of Crohn’s Disease. The WJG Press and Baishideng, 2009.